Sectional boiler



A ril 14, 1931. .1. A. WADDELL ET AL 1,300,915

SECTIONAL BOILER Filed Aug. 29, 1928 Josgph A. Waddell James WForesman Inventors Patented Apr. 14, 1931 UNITED STATES PATENT OFFICE JOSEPH A. WADDELL AND JAMES W. FORESMAN, OF WILLIAMSPOET, PENNSYLVANIA, ASSIGNORS TO S?ENCER HEATER COMPANY, \VILLIAMSPORT, PENNSYLVANIA,

A CORPORATION OF PENNSYLVANIA SECTIONAL BOILER Application filed August 29, 1928. Serial No. 302,814.

This invention relates to sectional steam boilers and has for its object to provide a device which is simple in construction and eificient in use. With these and other objects in view the invention consists in the novel details of construction and combinations of parts as will be more fully hereinafter disclosed and particularly pointed out in the claims.

Referring to the accompanying drawings forming a part of this specification in which like numerals designate like parts in all the views:

Fig. 1 is an elevational view of one of the 15. sections used in constructing the steam boilers of this invention;

Fig. 2 is a detail elevational view taken as on the line 2'-2 of Fig. 1 and looking in the direction of the arrows; and

20 Fig. 3 is a transverse sectional view taken as on the line 3--3 of Fig. 1 and looking in the direction of the arrows.

It is well known that eiiicient steam boilers are preferably constructed in units or sec- 25 tions, the plurality of units being secured together by suitable means to produce the complete heating plant. Further these boilers include a plurality of identical intermediate units, a front unit and a back unit, and 30, all of said units are so formed as to provide continuous conductive passages for the water of the boiler, as well as a continuous conduit for the steam generated from said water.

Such heretofore well known constructions 35. are exemplified in the U. S. Letters Patent No. 1,045,668 to D. Boies and J. A. Waddell, 3'12, entitled Sectional boiler and No. 1,063,088 granted to J. A. lVaddell, jr., and entitled \Vater jacket furnace, the former disclosing double grate construction wherein the fuel magazine is disposed centrally of the boiler intermediate of the waterlegs, and the latter patent disclosing a single grate boiler wherein the magazine is disposed on one side of 5 the boiler. This invention is directed to an as by a nipple threaded into the passage 7.

improvement over the construction shown in the last mentioned patent.

In Fig. 1 is shown in elevation one of the intermediate water sections of the vboiler and which comprises a fuel magazine 5 disposed on one side of said section and immediately above a water leg 6 which is adapted to connect with the similar water leg of an adjacent section in a well known manner namely On the other side of the section and forming one wall of the magazine space 5 is a chamber generally indicated by the numeral 8 having formed therethrough the flue passages 9 through which the gases of combustion will travel as readily understood. This water chamber 8 has a depending portion 10 which is inclined from the vertical in a direction towards the inner inclined surface 11 of the water leg 6 to provide the constricted throat 12 at the bottom of the fuel magazine chamber.

At or near the top of the section and preferably centrally disposed thereof is the passage 13 threaded as indicated at 14 to receive a nipple to connect said section with the one next adjacent. Within the chamber 8 and integrally cast with the Walls thereof is a bafile plate 15 extending around the lowermost half of the passage 13 to prevent Water entrained with thesteam entering said passage, whereby a steam substantially free of Water is obtained from each section. 16 represents the normal level of liquid in the section. The chamber 8 communicates with a vertical water leg 20 which extends to a point below the grate and has at itsbottom a passage 21 threaded as at 22 to receive a nipple connecting the section with the one next adjacent. 23 is a hollow web connecting the Water leg 6 with the depending throat piece 10 associated with the chamber 8. The thickness ofthe web 23 is made such as to permit the coal from the magazine 5 to readily but moderately flow past the sides of said web down through the throat 12 to the grate as will be readily understood by one skilled in the art.

Thus it will be seen that there is provided a substantially inverted U-shaped section having parallel sides each of which constitutes a water leg, and that these water legs are connected by the web chamber 23 and the upper chamber 8 where steam is evolved. Further it will be seen that the plurality of sections may be readily assembled by nipples screwed into the water and steam passages 7, 13 and 21, the water passages 7 and 21 being disposed at the lowermost ends of the water posed immediately below and in continuation of the water legs 6 and 20, each ofisaid supporting legs 25 being braced as at 26 by a web for added strength. Both sides of each intermediate section are similarly provided with an integrally cast narrow or thin" out standing rib 3O ground to provide a perfectly plane smooth surface so that when two adjacent sections are placed together the rib of one will register with the rib ofthe other, creating therebetween a joint which is sufficiently tight to prevent. the escapeof heat from the boileras a whole. This rib start at the bottom of one of thesupporting legs 25, or in other words at the floor-line, extends upsaid leg, entirely encircles the water passage such as 21 and extends upwardly and downwardly therefrom along the inner side of the water leg 20 to provide a closed firebox. Thence the rib extends diagonally across the Water leg 20 and up along'the outer side thereof around and across the top of'tho boiler down the other outer side of the opposite water leg '6, around the other. water passage 7, and thence down the other supporting leg 25 to the floor line. A branch rib 31 extends from said water passage 7 along theinner side ofthe water leg 6' to provide a closed fire box and'magazine throat, joining the rib 30 at the upper end ofsaid water leg.

It will thus be clear that the branch rib 31 furnishes a means of creating'the substantially coextensive surfacell, when the sec tions are assembled,whichpositively directs the coal from the magazine5 to and onto the grate.

There is also provided a rib 32- on the other side of the fuel magazine throatwhich extends around the steam outlet 13 and creates a surface on the other side of the magazine for the ready passage of fu e Lastly there is provided a plurality of grate.

aligned ribs 33 placed immediately. below the flue passages 9 to substantially and effectively form a roof for the combustion chamber 35. These ribs are, however, so disposed as to create small passages 34 therebetween as well as between the ribs 30 and 32 as clearly shown in the drawings for the purpose of permittin some of the ases of combustion to pass directly to the due passages 9, as well as to maintain a higher degree of heat within said flue'passages.

The grate may be composed of two members, such as indicated at 40 and-41, for each water section and'eachmember provided with a depending arm 42 to a which: the shaker bars (not shown) are secured as well understood. The member 40 is recessed at its lower end to fit avlug 43 cast on the fire box side of the water leg 20 and at the lowermostendthereof; The. grate is set at an inclination of about 30 i-n connection. with the. magazine fuel feed. principal of .the.

boiler and therefore the other end of the,"

grate is secured in place onthe fire box side of the other water leg 6 at apoint-slightly;

above thepassage 7. 'With this set of the.

grate there will automatically occur a settling of the burned fuel on the grate. with resultantsifting of ashes therethrough. V In the Water leg 6.011 the. fire boxyside there is cast a recess or. pocket 45 located. at the point where the surface 11 over which the fuelslides meetsthe grate andgintofthis pocket is slipped the trunnion 46v at the. upper end of the grate member 41. The. fire,

box side of the water leg .6 is reversely formed to provide a surface 47 forming an angle,

of approximately 120 with'thesurface 11. and parallel to the fire boxsurface of the other water leg. 2O. Theback: side of the. recess 45' is parallelv tothe surface/17, and

the bottom wall of said recess isperpendicw lar tosaid surface.

It thus resultsthat the grate bars canbe quickly inserted in position by first placingthe lower end' thereof Overthe lug-43 and then dropping-the trunnion 46 atthe upper end thereof into thepocket 45,.it beingunders'tood that said lug and, said-pocket are coaxially disposed with reference to, the grate bars and are centrally disposedwith reference to each water section ofthe boiler.

Theready removal of anygrate section is accomplished by first disengagingthe samefrom the shaker'barssand then reversing the steps above mentioned for inserting said Not only does construction providea simple and'quick means for inserting, and re- 0 moving. the individual grate sections, but. it

also provides a positive and uninterrupted feed of the fuel to the grate. In other words, the pocket 45 is formed atthe junc tion of thesurface llwith} the grate and the surface 47, so that the fuel will slide over said surface 11 directly onto the grate and thence over the grate surface while being consumed.

By this invention there is provided a smooth flow of fuel to the grate with no shelves or pockets onto or into which the fuelcollects before it passes to the grate. Therefore there is avoided the collection of a mass of fuelbeyond the magazine throat of considerable dimension which is not immediately subjected to combustion temperatures, with the result that fires of greater heat intensity are made possible. by the present invention.

By reversely inclining the surface 47 air is positively directed to the fuel as soon as it reaches the grate and consequently combustion starts immediately, or in other words all of the fuel on the grate is subjected to oxidation or consumption with resultant higher fire temperatures than heretofore possible. The position of the back and bottom walls of the pocket 45 makes said pocket self cleaning as will be evident, and any ash tending to ac cumulate at the lower end of the grate will not clog the support thereof with resultant displacement of said grate due to the lug 43 entering the recessed end of the grate. The lug 43 being circular provides substantially 360 of supporting contact during shaking and dumping operations so that it is impossible to dislodge the lower supporting end of the grate, and the pocket 45 is of such a depth that dislodgment of the upper supporting end is practically impossible during said operations.

From the foregoing it will thus be seen that by this construction which is peculiarly adapted to sectional boilers of the magazine feed type and having a single inclined grate that there is provided a water leg 20 constituting one side of the section and which extends to the top thereof as well as a chamber 8 in open communication with said water leg and extending across the upper half of said section. Also there is provided a fuel magazine disposed at the top of said section adjacent said chamber 8 but which lacks any water jacket about its top and outer side. A second water leg 6 is disposed on the other side of the section said water leg extending only to said fuel magazine and provided with an upper inclined surface 11 as well as a lower inclined surface 47, the lower surface being parallel with the inner surface of the lowermost end of the water leg 20. A hollow web 23 joins in open communication a depending portion 10 of the chamber 8 with the water leg 6, said depending portion 10 being inclined from the vertical toward the inclined surface 11 of the water leg 6 to form therewith a constricted throat 12 through which the fuel passes from the magazine 5 thereabove, and the upper surface of the hollow web adapted to form a floor for some of the fuel in the magazine but inclined to the horizontal to direct fuel therefrom to said constricted throat so that practically all of the fuel from the magazine 5 may readily pass through the throat to the grate. Lastly there is provided the lug 43 extending from the inneror fire box side of the water leg 20, as well as a pocket 45 disposed in the fire box side of the other water leg 6 at the junction between the inclinedsurfaces 11 and 47 thereof, said 111 and said pocket being disposed perpendicularly opposite each other due to the parallelism of the inner surfaces of said water legs, and constituting self cleaning supports for the grate members 40 and 41.

It will be noted that the leg 6 is of triangular shape andthat the water passage therethough is bent to follow the inner inclined surfaces 47 and 11 which are diverged at a point near the top of the high end of the grate members 40, 41. The outer side of the leg 6 is substantially flush with the solid outer wall of the fuel magazine 5 to form one side of the section. The top of the latter is formed by the top of the chamber 8 and the solid top wall of the magazine. With this construction all the water passages are so positioned that the heat from the fire will gradually increase the temperature of the water as it passes from the passages? and 21 to the chamber 8.

It is obvious that those skilled in the art may vary the details of construction as well as arrangements of parts without departing from the spirit of the invention and it is therefore not desired to be limited to the foregoing disclosure except as may be required by the claims.

What is claimed is 1. In a boiler construction of sectional magazine feed type with single inclined grate the combination of a water leg constituting one side of a section said leg extending to the top of said section; a second water leg constituting part of the other side of said section said leg extending substantially two-thirds of the distance to the top of said section and provided with an inclined inner surface; a chamber in open communication with said first named water leg and extending across the upper half of said section; an extension I:

of said chamber depending therebelow and inclined towards the inclined surface of said second water leg to form therewith a constricted throat through which the fuel passes from a magazine therefor; a hollow web in I ,1

open communication with and connecting said depending extension with the top of said second water leg; said web extending to a point near the grate outlets from said first and second named water legs and from said chamber to an adjacent section; and self cleaning grate supports on said water legs.

2. In a boiler construction of sectional magazine feed type with single inclined grate the combination of a water leg constituting one side of a section said leg extending to the top of said section; a chamber in opencom-' munication with said water leg and extend ingacross the upper rhalf ofsaid section; a. fuel magazine disposed atthe'top of sa1dsec tion adjacent said chamber and lacking a water-jacket about its top and outer side; a'

second water leg disposedon the other sideof saidsection and extending only to'said magazine said leg providedwith an lnclined inner surface; anext-ension of said chamber depending therebelow and inclined towards the lnclined surface of said second water 7 leg to form therewith a constricted throat through which the fuel passes from said magazine; a hollow web in. open communication with andconnecting said depending ex-- tension ofp said chamber with the top of said second water leg the'upper surface of said web forming a flooring for some of the fuel in said magazine; outlets from said first and second named water legs and from said chamber to an adjacent section; and self cleaning grate supports on said water legs.

3. In a boiler construction of sectional ma azine feedt e with sin le inclined rate the combination of a water leg constituting one side of a section saidleg extending to the top of said section; a chamber in open communication with said water legandextending across the upper half of said section; alfuel magazine disposed at the topof said section adj acent: said'chamber and lacking a water-jacket about'its top and outer side; a second water leg disposed on the other side of said section and extending only to said magazine said leg provided with anupper surface inclined inwardly; an extension of said chamber depending therehelow and inclined towards the upper surface of said second water leg to form therewith a constricted throat through which the fuel passes from said magazine; a hollow web in open communication with and connecting said depending extension of said chamber with the top of said second water leg the upper surface of said web forming a flooring for some ofthe fuel in said magazine but inclinedv to the horizontal to direct fuel therefrom to said constricted throat; outlets from said first andsecondnamed water legs and from said chamber to an adjacent section; and self cleaning grate supports on saidwater legs. t. In a boiler construction of sectional magazine feed type with single inclined grate the combination of a water leg constituting one side of a section said leg provided with a lowermost end having an uppersurface, said leg extending to the top of said section; a chamber in open communication with saidwater leg and extending across the upper half of said section; a fuel magazinedisposed at the top of said section adjacent said chamber and lacking a. water jacket about its-top and outer side; a second water leg disposedon the other side of said section and extending only to said magazine said leg provided with an upper surface inclinedinward ly and a lower surface inclined outwardly, the lower surface being substantially paral-V lel to the upper surface of the lowermost endofsaid first water leg; an extensionof said chamber depending therebelow and ing clined towards the upper surface. of said sec ond waterleg to form therewith a constricted throat through which the fuel passesfrom said magazine; a hollow web in open'coms munication with and connecting said depending extension of said chamber with the top of said second water leg; outlets from said first and second named water legs and from said chamber to an adjacent section; a rate support. formed on the upper surface of the lowermostend of said first water leg; and a second grate support formed on the lower surface-of said second water leg opposite said first grate support.

5. In a boiler. construction of sectional magazine feed [type with single inclined grate the combination of a water leg constitut ng one side of a section said leg provided w th a lowermost end havlng an upper.

surface, said leg extending to the top of said section; a chamber in open communication with said water leg and extending across the upper half of said section; a fuel magazine disposed at the top ofsaid-section adjacent said chamber and lacking a water jacket about its top and outer side; a second water leg disposed on the other side of said section and extending only to said magazine said from said chamber to an adjacent section; V

a grate support comprising a lug formed on the upper surface of the lowermostend of said first water leg; and a second grate: support comprising a pocket formed on the lower surface of said second" water leg opposite said firstgrate support.

6. In aboiler construction of sectional magazine feed type. with single inclined grate the'combination of a water legfconstituting one side of a section said leg extends ing tothe top of saidsection; a second water leg constituting part of the other side of said section said leg extending substantially twothirds ofthe distanceto the top of said section and provided with an inwardly inclined upper surface and an outwardly inclined lower surface; a chamber in open communication with said first named water leg and extending across the upper half of said section; an extension of said chamber depending therebelow and inclined towards the upper surface of said second water leg to form therewith a constricted throat through which the fuel passes from a magazine therefor; a hollow webin open communication with and connecting said depending extension of said chamber with the top of said second water leg; outlets from said first and second named water legs and from said chamber to an adjacent section; and male and female grate supports disposed opposite to each other, one of said supports formed in the lower surface of said second water leg.

7 In a boiler construction of sectional magazine feed type with single inclined grate the combination of a water leg constituting one side of a section said leg having an inwardly inclined upper surface; a second water leg constituting part of the other side of said section said leg having an inwardly inclined upper surface and an outwardly inclined lower surface said lower surface being substantially parallel to the said upper surface of the first mentioned water leg; water passage connecting the upper portions of both of said water legs and extending around one side to the bottom of the fuel magazine; outlets from said first and second named water legs as well as from said passage to an adjacent section; and oppositely disposed grate supports one in the said upper surface of the first Water leg and the other in the lower surface of the second water leg.

8. In a boiler construction of sectional magazine feed type with single inclined grate the combination of a water leg constituting one side of a section said leg having an inwardly inclined upper surface; a second water leg constituting part of the other side of said section said leg having an inwardly inclined upper surface and an outwardly inclined lower surface said lower surface being substantially parallel to the said upper surface of the first mentioned water leg; a water passage connecting the upper portions of both of said water legs and extending around one side and the bottom of the fuel magazine; outlets from said first and second named water legs as well as from said passage to an adjacent section; and oppositely disposed grate supports in said water legs, one of said supports being at the juncture of the upper and lower surfaces of said second water leg.

9. A sectional boiler of the magazine feed type having an inclined grate; a water chamher; a fuel magazine, the said chamber and magazine being located side by side at the top of a section, the top of the section above the fuel magazine and the outer side of the fuel magazine remote from the chamber being formed as solid wallsya hollow web communicating with the chamber and "located at the bottom of the fuel magazine, the section having water passages at opposite sides thereof; a water leg forming a communication between one of the passages and the chamber and forming therewith one side ofthe section; and a water leg of constantly varying cross-section communicating with the other passage and the hollow web and connected with the outer solid wall of the fuel magazine to form the other side of the section. a

10. A sectional boiler having an inclined grate; water legs extending along opposite sides of a section and having inner surfaces substantially perpendicular to the top of said typehaving an inclined grate; awater chamber; a fuel magazine,-the1 said chamber and magazine being located side by side at the top of a section,the top of thesection'above the fuel magazineand the outer side of the fuel magazine remotefromthe chamber being formed as solid walls; a hollow web communicating with the chamber and located at the bottom of the fuel magazine, the section having water assages at opposite sides thereof; a water eg forming a communication between oneof the passages and the chamber and forming therewith one side of the section; and a triangular shaped leg having a water passageway therethrough communicating with the other passage and having its outer side substantially flush with the solid outer wall of the fuel magazine. to form the other side of the section and having its inner sides diverged from one another at a point near thetop of the high end of the grate, the upper end of the passagewaycommunicatingwith the hollow weband terminating adjacent the top thereof.

13. A sectional boiler ofthe magazine feed type having an inclined grate; a Water chamber; a fuel magazine, the said chamber and if magazine being located side by side at the top of a section, the top of the section above the fuel magazine and the outer side of the fuel magazine remote from the chamber bely flush with the solid outer wall of the fuel magazineto form the other side of the sectionand having its inner sides formed of unequal lengths and diverged from one another at a pointnear the top of the high end of thegrate, the longer side of the bent pashaving its top wall formed as a continuation sageway being connected with the solid outer carrying, the upper end of th'e 'gra'te, the

inner surface substantially .isepndieu1fntt the planeQof the grate ;;means carried b one of said leg surfaces for supporting the; ower end of the grate; and an'op en bearin for aring being formed as a recess'mfthe other of said leg surfaces. 7 1 y l In testimony whereof we afiix our signatures. i JOSEPH A. WADDELL. JAlVLES a wall of the fuel magazine to direct the fuel 7 1 onto the grate; an extension depending from the'chamber and inclined towards the said longer side to form therewith a constricted throat for the passage of fuel from the magazine; and a hollow web forming a 0011111111111- cation between the said. extension and the upper end of the long side of the bent passageway, the upper surface of the web being inclined to facilitate the discharge of fuel from the magazine. 1 I

14. An integral boiler section of substantially an inverted U shape comprising a water 7 leg, a chamber communicating withthe leg and forming therewith one side and substantially half thetopof the section; a fuel magazine formed beside the chamber and it of the top of-the chamber to complete the top of the section, the said top wall and the outer side of the magazine remote from the chamber being formed as solid walls; a hollow web communicating with the chamber and lO cated at the bottom of the fuel 'magazine; a waterleg of constantly varying cross-sec tion having its outer side substantially flush with the solid side wall of the magazine to municating with the hollow web and terminating adjacent the upper surface thereof, the said legs and chamber beingiprovided with outlets; and means integral with the water legs for supporting a grate.

15. 'A sectional boiler of the magazine feed formthe other side of. the section, the upper 2 part of the last mentioned water leg -com- I lit type having aninclined grate;'a fuel magazine located above the high end of the grate; andwater legs extending along opposite sides of a section and having surfaces inclined substantially perpendicularly to the plane of the grate for supporting the ends of the same, one of the water legs havinga substantially straight surface inclinedfrom a point adjacent the top of the high end of the grate to the fuel magazine whereby the fuel will be directed in a substantially straightpath on 'tothegrate. 7 9 V v 16. A sectional boiler having a pivoted in- I clined grate; water legs extending, along opposite sides of a section each leg having an 

